Doping Evolution of Energy Gaps in Bi<sub>2</sub>Sr<sub>2</sub>CaCu<sub>2</sub>O<sub>8+δ</sub> superconductors studied by Laser-based ARPES

ORAL

Abstract

The energy gap is a key quantity in understanding the high temperature superconductivity mechanism in cuprate superconductors. We have carried out comprehensive angle-resolved photoemission (ARPES) measurements on Bi2Sr2CaCu2O8+δ (Bi2212) superconductors by utilizing our high resolution laser-based ARPES system equipped with an angle-resolved time-of-flight (ARToF) electron energy analyzer and lasers with 7 and 11 eV photon energies. With high instrumental resolution (~1 meV) and wide coverage of the momentum space, we will report detailed doping, momentum and temperature dependences of the energy gap (superconducting gap and pseudogap) in Bi2212. Implications of these results will be discussed.

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Presenters

  • Ping Ai

    • Chinese Academy of Sciences
    • The Chinese Academy of Sciences, Institute of physics

Authors

  • Ping Ai

    • Chinese Academy of Sciences
    • The Chinese Academy of Sciences, Institute of physics

  • Qiang Gao

    • Institute of Physics, Chinese Academy of Sciences
    • Chinese Academy of Sciences
    • The Chinese Academy of Sciences, Institute of physics

  • Liu Jing

    • Chinese Academy of Sciences

  • Jianwei Huang

    • Institute of Physics, Chinese Academy of Sciences
    • Chinese Academy of Sciences

  • Ying Ding

    • Institute of Physics, Chinese Academy of Sciences
    • Chinese Academy of Sciences

  • Guodong Liu

    • Institute of Physics, Chinese Academy of Sciences
    • Chinese Academy of Sciences
    • The Chinese Academy of Sciences, Institute of physics

  • Genda Gu

    • Brookhaven National Laboratory
    • Brookhaven National Lab
    • Department of Condensed Matter Physics and Materials Science, Brookhaven, Brookhaven National Laboratory, Upton, New York 11973-5000, USA.
    • Cond. Matt. Physics and Material Science, Brookhaven Natl Lab
    • Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory
    • Condensed Matter Physics & Materials Science Department, Brookhaven National Laboratory
    • Brookhaven National Labs, Long Island, NY, USA, 11973
    • Condensed Matter Physics & Materials Science, Brookhaven National Laboratory
    • Condensed Matter Physics, Brookhaven National Laboratory
    • Brookhaven National Laboratories
    • Chinese Academy of Sciences
    • Condensed Matter Physics & Materials Science, Brookhaven National Lab
    • Brookhaven Natl Lab

  • Xingjiang Zhou

    • Chinese Academy of Sciences (CAS)
    • Institute of Physics, Chinese Academy of Sciences
    • National Laboratory for Superconductivity (NLSC), Institute of Physics, CAS
    • Chinese Academy of Sciences
    • The Chinese Academy of Sciences, Institute of physics